BAEL-1221: How Spring MVC Really Works (#2757)

* BAEL-1221: How Spring MVC Really Works

* BAEL-1221: Moved the project to the guest directory

guest/spring-mvc/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.forketyfork.guest</groupId>
+    <artifactId>spring-mvc</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>spring-mvc</name>
+    <description>Spring MVC sample project</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.0.M5</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+    </dependencies>
+
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+    <pluginRepositories>
+        <pluginRepository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </pluginRepository>
+    </pluginRepositories>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+</project>

guest/spring-mvc/src/main/java/com/forketyfork/guest/springmvc/Spring5Application.java

@@ -0,0 +1,15 @@
+package com.forketyfork.guest.springmvc;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.boot.SpringApplication;
+
+@SpringBootApplication
+@ComponentScan(basePackages = {"com.forketyfork.guest.springmvc"})
+public class Spring5Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Spring5Application.class, args);
+    }
+
+}

guest/spring-mvc/src/main/java/com/forketyfork/guest/springmvc/model/LoginData.java

@@ -0,0 +1,27 @@
+package com.forketyfork.guest.springmvc.model;
+
+public class LoginData {
+
+    private String login;
+
+    private String password;
+
+    public LoginData() {
+    }
+
+    public String getLogin() {
+        return login;
+    }
+
+    public void setLogin(String login) {
+        this.login = login;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

guest/spring-mvc/src/main/java/com/forketyfork/guest/springmvc/web/InternalsController.java

@@ -0,0 +1,31 @@
+package com.forketyfork.guest.springmvc.web;
+
+import com.forketyfork.guest.springmvc.model.LoginData;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.servlet.ModelAndView;
+
+import java.util.Collections;
+
+@Controller
+public class InternalsController {
+
+    private static final String LOGIN = "jack";
+    private static final String PASSWORD = "halloween";
+
+    @GetMapping("/")
+    public String hello() {
+        return "login";
+    }
+
+    @PostMapping("/login")
+    public ModelAndView login(LoginData loginData) {
+        if (LOGIN.equals(loginData.getLogin()) && PASSWORD.equals(loginData.getPassword())) {
+            return new ModelAndView("success", Collections.singletonMap("login", loginData.getLogin()));
+        } else {
+            return new ModelAndView("failure", Collections.singletonMap("login", loginData.getLogin()));
+        }
+    }
+
+}

guest/spring-mvc/src/main/resources/templates/failure.html

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+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Login Failure</title>
+</head>
+<p>
+    User with login <span th:text="${login}"></span> not found, please <a href="/">try again</a>.
+</p>
+</html>

guest/spring-mvc/src/main/resources/templates/login.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head><title>Login Form</title></head>
+<body>
+
+<form method="post" action="/login">
+    <input type="text" placeholder="Login" name="login"/>
+    <input type="password" placeholder="Password" name="password"/>
+    <button type="submit">Submit</button>
+</form>
+
+</body>
+</html>

guest/spring-mvc/src/main/resources/templates/success.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Login Success</title>
+</head>
+<p>
+    Hello, <span th:text="${login}"></span>!
+</p>
+</html>